Jump to content

Solder missing RAM-holdings on the mainboard

Recommended Posts


my HP 8770w was sold with a Dualcore-CPU. I am now using an i7 3920XM, but there are missing two RAM-holdings on this mainboard (Many manufactures leave them out on dualcore MBs :pirate: ). The 4-RAM-MB is too expensive just for this approach. So I tried to solder the missing RAM-Holdings on the Mainboard by hand: RAM-Solder.jpg


But the Laptop does not boot, if I add a RAM to the new holding (Same behaviour as like booting without any RAM). The Laptop still works, if I left the new holding empty.


QUESTION: Is it possible, that a 3-RAM-configuration principally does not work and I will have to add the 4th module? Have anyone here successfully expanded the number of RAM-holdings?

Link to comment
Share on other sites

  • 2 weeks later...

Did you went over every 2 pins and checked for continuity in them?

Also, the socket plastic seems melted, not everybody can do it, is not hard I guess but is not something everybody can do it.


Last thing... could there be a custom bios required/custom bios options to unlock both banks of memory or maybe some small resistors/capacitors around that are missing as well?

Link to comment
Share on other sites

  • 1 month later...

The plastic is a bit melted, because I used too high temperature with the fan :angel:  But this is only at the surface, the pins look OK. I tested against shortcuts using an ohmmeter and none of the pins is loose. Which does off-curse not mean, that the electrical connection is OK...


I don't think, it's the BIOS - the System does not start, if there is a RAM in the holding, so it gets principally recognized.


I will need extreme fine equipment when I try this again :D

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.